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ProstaCaid™ inhibits tumor growth in a xenograft model of human prostate cancer

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We have recently demonstrated that the dietary supplement ProstaCaid™ (PC) inhibits growth and invasive behavior of PC-3 human prostate cancer cells in vitro. In the present study, we evaluated toxicity and whether PC suppresses growth of prostate cancer in a xenograft model of human prostate cancer cells implanted in mice. Here, we show that an oral administration of PC (100, 200 and 400 mg/kg) did not affect body weight or activity of liver enzymes (ALT, AST) and did not show any sign of toxicity in liver, spleen, kidney, lung and heart tissues in mice. In addition, PC treatment resulted in the inhibition of tumor volumes (1024.6±378.6 vs. 749.3±234.3, P<0.001) in a xenograft model of prostate cancer with human hormone refractory (independent) PC-3 prostate cancer cells. Moreover, qRT-PCR analysis demonstrated significant upregulation of expression of CDKN1A (p21) and inhibition of expression of IGF2, NR2F2 and PLAU (uPA) genes by an oral administration of PC in prostate cancer xenografts. Our study demonstrates that the concentrations of the dietary supplement ProstaCaid tested did not show signs of toxicity, and its oral application has significant anticancer activity in vivo and can be considered as an alternative treatment for prostate cancer patients.
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Document Type: Research Article

Affiliations: 1: Cancer Research Laboratory, Methodist Research Institute, Indiana University Health, Indianapolis, IN, USA 2: Amitabha Medical Clinic and Healing Center, Sebastopol, CA, USA 3: Department of Pathology, Indiana University School of Medicine, Indianapolis, IN, USA

Publication date: January 1, 2012

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  • The International Journal of Oncology provides an international forum for the publication of the latest, cutting-edge research in the broad area of oncology and cancer treatment. The journal accepts original high quality works and reviews on all aspects of oncology research including carcinogenesis, metastasis, epidemiology, chemotherapy and viral oncology. Through fair and efficient peer review, the journal is dedicated to publishing top tier research in the field, offering authors rapid publication as well as high standards of copy-editing and production. The International Journal of Oncology is published on a monthly basis in both print and early online.
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